Lee Mu Jin is a South Korean singer-songwriter who rose to fame after appearing on the music audition show Sing Again in 2020, in which he finished in 3rd place. His 2021 single, "Traffic Light", spent three weeks at number one on South Korea's Gaon Digital Chart. On March 1, 2022 Big Planet Made confirmed that they has signed an exclusive contract with Lee Mu Jin. (Source: Wikipedia) Watch drama online for free.